<template>
	<div class="sc-upload" :class="{ 'sc-upload-round': round }" :style="style">
		<div v-if="file && file.status !== 'success'" class="sc-upload__uploading">
			<div class="sc-upload__progress">
				<el-progress :percentage="file.percentage" :text-inside="true" :stroke-width="16" />
			</div>
			<el-image class="image" :src="file.tempFile" fit="cover"></el-image>
		</div>
		<div v-if="file && file.status === 'success'" class="sc-upload__img">
			<el-image
				class="image"
				:src="file.url"
				:preview-src-list="[file.url]"
				fit="cover"
				hide-on-click-modal
				append-to-body
				:z-index="9999"
			>
				<template #placeholder>
					<div class="sc-upload__img-slot">Loading...</div>
				</template>
			</el-image>
			<div v-if="!disabled" class="sc-upload__img-actions">
				<span class="del" @click="handleRemove()"
					><el-icon><el-icon-delete /></el-icon
				></span>
			</div>
		</div>
		<el-upload
			v-if="!file"
			ref="uploader"
			class="uploader"
			:auto-upload="cropper ? false : autoUpload"
			:disabled="disabled"
			:show-file-list="showFileList"
			:action="action"
			:name="name"
			:data="data"
			:accept="accept"
			:limit="1"
			:http-request="request"
			:on-change="change"
			:before-upload="before"
			:on-success="success"
			:on-error="error"
			:on-exceed="handleExceed"
		>
			<slot>
				<div class="el-upload--picture-card">
					<div class="file-empty">
						<el-icon><component :is="icon" /></el-icon>
						<h4 v-if="title">{{ title }}</h4>
					</div>
				</div>
			</slot>
		</el-upload>
		<span style="display: none !important"><el-input v-model="value"></el-input></span>
		<el-dialog
			v-model="cropperDialogVisible"
			title="剪裁"
			draggable
			:width="580"
			destroy-on-close
			@closed="cropperClosed"
		>
			<sc-cropper
				ref="cropper"
				:src="cropperFile.tempCropperFile"
				:compress="compress"
				:aspectRatio="aspectRatio"
			></sc-cropper>
			<template #footer>
				<el-button @click="cropperDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="cropperSave">确 定</el-button>
			</template>
		</el-dialog>
	</div>
</template>

<script>
import { defineAsyncComponent } from 'vue'
import { genFileId } from 'element-plus'
import config from '@/config/upload'

const scCropper = defineAsyncComponent(() => import('@/components/scCropper'))

export default {
	props: {
		modelValue: { type: String, default: '' },
		height: { type: Number, default: 148 },
		width: { type: Number, default: 148 },
		title: { type: String, default: '' },
		icon: { type: String, default: 'el-icon-plus' },
		action: { type: String, default: '' },
		apiObj: { type: Object, default: () => {} },
		name: { type: String, default: config.filename },
		data: { type: Object, default: () => {} },
		accept: { type: String, default: 'image/gif, image/jpeg, image/png' },
		maxSize: { type: Number, default: config.maxSizeFile },
		limit: { type: Number, default: 1 },
		autoUpload: { type: Boolean, default: true },
		showFileList: { type: Boolean, default: false },
		disabled: { type: Boolean, default: false },
		round: { type: Boolean, default: false },
		onSuccess: {
			type: Function,
			default: () => {
				return true
			}
		},

		cropper: { type: Boolean, default: false },
		compress: { type: Number, default: 1 },
		aspectRatio: { type: Number, default: NaN }
	},
	components: {
		scCropper
	},
	data() {
		return {
			value: '',
			file: null,
			style: {
				width: this.width + 'px',
				height: this.height + 'px'
			},
			cropperDialogVisible: false,
			cropperFile: null
		}
	},
	watch: {
		modelValue(val) {
			this.value = val
			this.newFile(val)
		},
		value(val) {
			this.$emit('update:modelValue', val)
		}
	},
	mounted() {
		this.value = this.modelValue
		this.newFile(this.modelValue)
	},
	methods: {
		newFile(url) {
			if (url) {
				this.file = {
					status: 'success',
					url: url
				}
			} else {
				this.file = null
			}
		},
		cropperSave() {
			this.$refs.cropper.getCropFile(
				(file) => {
					file.uid = this.cropperFile.uid
					this.cropperFile.raw = file

					this.file = this.cropperFile
					this.file.tempFile = URL.createObjectURL(this.file.raw)
					this.$refs.uploader.submit()
				},
				this.cropperFile.name,
				this.cropperFile.type
			)
			this.cropperDialogVisible = false
		},
		cropperClosed() {
			URL.revokeObjectURL(this.cropperFile.tempCropperFile)
			delete this.cropperFile.tempCropperFile
		},
		handleRemove() {
			this.clearFiles()
		},
		clearFiles() {
			URL.revokeObjectURL(this.file.tempFile)
			this.value = ''
			this.file = null
			this.$nextTick(() => {
				this.$refs.uploader.clearFiles()
			})
		},
		change(file, files) {
			if (files.length > 1) {
				files.splice(0, 1)
			}
			if (this.cropper && file.status === 'ready') {
				const acceptIncludes = ['image/gif', 'image/jpeg', 'image/png'].includes(file.raw.type)
				if (!acceptIncludes) {
					this.$notify.warning({
						title: '上传文件警告',
						message: '选择的文件非图像类文件'
					})
					return false
				}
				this.cropperFile = file
				this.cropperFile.tempCropperFile = URL.createObjectURL(file.raw)
				this.cropperDialogVisible = true
				return false
			}
			this.file = file
			if (file.status === 'ready') {
				file.tempFile = URL.createObjectURL(file.raw)
			}
		},
		before(file) {
			const acceptIncludes = this.accept.replace(/\s/g, '').split(',').includes(file.type)
			if (!acceptIncludes) {
				this.$notify.warning({
					title: '上传文件警告',
					message: '选择的文件非图像类文件'
				})
				this.clearFiles()
				return false
			}
			const maxSize = file.size / 1024 / 1024 < this.maxSize
			if (!maxSize) {
				this.$message.warning(`上传文件大小不能超过 ${this.maxSize}MB!`)
				this.clearFiles()
				return false
			}
		},
		handleExceed(files) {
			const file = files[0]
			file.uid = genFileId()
			this.$refs.uploader.handleStart(file)
		},
		success(res, file) {
			//释放内存删除blob
			URL.revokeObjectURL(file.tempFile)
			delete file.tempFile
			var os = this.onSuccess(res, file)
			if (os !== undefined && os === false) {
				this.$nextTick(() => {
					this.file = null
					this.value = ''
				})
				return false
			}
			var response = config.parseData(res)
			file.url = response.src
			this.value = file.url
		},
		error(err) {
			this.$nextTick(() => {
				this.clearFiles()
			})
			this.$notify.error({
				title: '上传文件未成功',
				message: err
			})
		},
		request(param) {
			var apiObj = config.apiObj
			if (this.apiObj) {
				apiObj = this.apiObj
			}
			const data = new FormData()
			data.append(param.filename, param.file)
			for (const key in param.data) {
				data.append(key, param.data[key])
			}
			apiObj
				.post(data, {
					onUploadProgress: (e) => {
						const complete = parseInt(((e.loaded / e.total) * 100) | 0, 10)
						param.onProgress({ percent: complete })
					}
				})
				.then((res) => {
					var response = config.parseData(res)
					if (response.code === config.successCode) {
						param.onSuccess(res)
					} else {
						param.onError(response.msg || '未知错误')
					}
				})
				.catch((err) => {
					param.onError(err)
				})
		}
	}
}
</script>

<style scoped>
.el-form-item.is-error .sc-upload .el-upload--picture-card {
	border-color: var(--el-color-danger);
}
.sc-upload .el-upload--picture-card {
	border-radius: 0;
}

.sc-upload .uploader,
.sc-upload:deep(.el-upload) {
	width: 100%;
	height: 100%;
}

.sc-upload__img {
	width: 100%;
	height: 100%;
	position: relative;
}
.sc-upload__img .image {
	width: 100%;
	height: 100%;
}
.sc-upload__img-actions {
	position: absolute;
	top: 0;
	right: 0;
	display: none;
}
.sc-upload__img-actions span {
	display: flex;
	justify-content: center;
	align-items: center;
	width: 25px;
	height: 25px;
	cursor: pointer;
	color: #fff;
}
.sc-upload__img-actions span i {
	font-size: 12px;
}
.sc-upload__img-actions .del {
	background: #f56c6c;
}
.sc-upload__img:hover .sc-upload__img-actions {
	display: block;
}
.sc-upload__img-slot {
	display: flex;
	justify-content: center;
	align-items: center;
	width: 100%;
	height: 100%;
	font-size: 12px;
	background-color: var(--el-fill-color-lighter);
}

.sc-upload__uploading {
	width: 100%;
	height: 100%;
	position: relative;
}
.sc-upload__progress {
	position: absolute;
	width: 100%;
	height: 100%;
	display: flex;
	justify-content: center;
	align-items: center;
	background-color: var(--el-overlay-color-lighter);
	z-index: 1;
	padding: 10px;
}
.sc-upload__progress .el-progress {
	width: 100%;
}
.sc-upload__uploading .image {
	width: 100%;
	height: 100%;
}

.sc-upload .file-empty {
	width: 100%;
	height: 100%;
	display: flex;
	justify-content: center;
	align-items: center;
	flex-direction: column;
}
.sc-upload .file-empty i {
	font-size: 28px;
}
.sc-upload .file-empty h4 {
	font-size: 12px;
	font-weight: normal;
	color: #8c939d;
	margin-top: 8px;
}

.sc-upload.sc-upload-round {
	border-radius: 50%;
	overflow: hidden;
}
.sc-upload.sc-upload-round .el-upload--picture-card {
	border-radius: 50%;
}
.sc-upload.sc-upload-round .sc-upload__img-actions {
	top: auto;
	left: 0;
	right: 0;
	bottom: 0;
}
.sc-upload.sc-upload-round .sc-upload__img-actions span {
	width: 100%;
}
</style>
